Cheat mode:
Press L, R(2), L(2), R at the options screen. A sound will confirm correct code entry. Hold L + R and press Start to choose any game mode. Then, hold L + R and press Start to display a cheat menu, with options for unlimited lives, level select, and blood mode. Note: Blood mode may not be enabled in the Japanese version of the game.

Display score:
Press Start to pause game play. Hold L + R and press X(3). Replace the controller with a light gun after the code is enabled to resume game play.

Unlimited ammunition:
Press Start to pause game play. Hold L + R and press Y(3). Replace the controller with a light gun after the code is enabled to resume game play.

Play as Sophie or a researcher:
Select Saturn mode. Hold L + R and press Up, Down, X, Y, Z at the character selection screen. Replace the controller with a light gun after the code is enabled to resume game play.

Full pause screen:
Pause game play and press X + Y + Z.